Hourly Solar Irradiations Estimation : From Horizontal Measurements to Inclined Data

We quantify the accuracy of various well-known models of the literature: the seven first type of models calculate diffuse horizontal irradiations from global ones and the fifteen second type models compute global irradiation on inclined planes from diffuse and global components on a horizontal surface. Then, the two classes of models are combined and the adequacy of each association is calculated for experimental hourly data collected on a French Mediterranean site. We compared these combinations with the Olmo model transforming directly global irradiations on tilted planes from horizontal ones.